| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3331 |
13.8%
|
| 2 | Monthly | 1604 |
6.7%
|
| 3 | Yearly | 1000 |
4.1%
|
| 4 | Not all | 18162 |
75.4%
|
| Sysmiss | 392 |